Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 88: Graphene-like materials: Silicene, MoS2 and relatives (with DY/MA/O/TT)

HL 88.7: Vortrag

Donnerstag, 3. April 2014, 11:45–12:00, POT 081

The effect of substrate and environment on the elementary excitations of MoS2 — •Eric Parzinger1, Marina Hoheneder1, Bastian Miller1, Anna Cattani-Scholz1, Alexander Holleitner1, Joel W. Ager2, and Ursula Wurstbauer11Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching (Germany) — 2Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94702 (United States)

The novel two-dimensional layered ’van-der Waals’ material Molybdenum disulfide (MoS2) is investigated using inelastic and resonant light scattering - a contactless and extremely versatile tool - to study phonon and electronic excitations. In particular, we focus on the influence of different supporting materials (SiO2, sapphire and SAMs of organic molecules) as well as various environmental conditions (ambient, vacuum and water) on the low energy excitations of MoS2. We find that both, different substrate and environment give rise to a significant modification of the most prominent Raman modes, whereas a monolayer is most effected by the environmental conditions. We gratefully acknowledge financial support by BaCaTec.

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